/Engine/Source/Runtime/MeshDescription/Public/MeshDescriptionBase.h
Returns the vertices which form the polygon perimeter
void GetPolygonVertices ( [FPolygonID](API\Runtime\MeshDescription\FPolygonID) PolygonID, [TArray](API\Runtime\Core\Containers\TArray)< [FVertexID](API\Runtime\MeshDescription\FVertexID) > & OutVertexIDs ) const